Electric and magnetic form factors of the proton

被引：255

作者：

Bernauer, J. C. ^{[1
]}

Distler, M. O. ^{[1
]}

Friedrich, J. ^{[1
]}

Walcher, Th ^{[1
]}

Achenbach, P. ^{[1
]}

Gayoso, C. Ayerbe ^{[1
]}

Boehm, R. ^{[1
]}

Bosnar, D. ^{[2
]}

Debenjak, L. ^{[3
]}

Doria, L. ^{[1
]}

Esser, A. ^{[1
]}

Fonvieille, H. ^{[4
]}

de la Paz, M. Gomez Rodriguez ^{[1
]}

Friedrich, J. M. ^{[5
,6
]}

Makek, M. ^{[2
]}

Merkel, H. ^{[1
]}

Middleton, D. G. ^{[1
]}

Mueller, U. ^{[1
]}

Nungesser, L. ^{[1
]}

Pochodzalla, J. ^{[1
]}

Potokar, M. ^{[3
]}

Majos, S. Sanchez ^{[1
]}

Schlimme, B. S. ^{[1
]}

Sirca, S. ^{[3
,7
]}

Weinriefer, M. ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[2] Univ Zagreb, Dept Phys, Zagreb 10002, Croatia

[3] Jozef Stefan Inst, Ljubljana, Slovenia

[4] Univ Blaise Pascal, LPC Clermont, CNRS, IN2P3, F-63177 Aubiere, France

[5] CERN, CH-1211 Geneva 23, Switzerland

[6] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

[7] Univ Ljubljana, Dept Phys, Ljubljana 61000, Slovenia

来源：

PHYSICAL REVIEW C | 2014年 / 90卷 / 01期

关键词：

FUNDAMENTAL PHYSICAL CONSTANTS; SQUARED 4-MOMENTUM TRANSFERS; SCATTERING CROSS-SECTIONS; CODATA RECOMMENDED VALUES; RADIATIVE-CORRECTIONS; POLARIZATION TRANSFER; ELASTIC-SCATTERING; 2-PHOTON-EXCHANGE; RATIO; MICROTRON;

D O I：

10.1103/PhysRevC.90.015206

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

This paper describes a precise measurement of electron scattering off the proton at momentum transfers of 0.003 less than or similar to Q(2) less than or similar to 1 GeV2. The average point-to-point error of the cross sections in this experiment is similar to 0.37%. These data are used for a coherent new analysis together with all world data of unpolarized and polarized electron scattering from the very smallest to the highest momentum transfers so far measured. The extracted electric and magnetic form factors provide new insight into their exact shape, deviating from the classical dipole form, and of structure on top of this gross shape. The data reaching very low Q(2) values are used for a new determination of the electric and magnetic radii. An empirical determination of the two-photon-exchange correction is presented. The implications of this correction on the radii and the question of a directly visible signal of the pion cloud are addressed.

引用

页数：34

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